CN213600910U - Color microlens array and projection system - Google Patents
Color microlens array and projection system Download PDFInfo
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- CN213600910U CN213600910U CN202023299531.5U CN202023299531U CN213600910U CN 213600910 U CN213600910 U CN 213600910U CN 202023299531 U CN202023299531 U CN 202023299531U CN 213600910 U CN213600910 U CN 213600910U
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Abstract
The utility model relates to a colored microlens array and projection system, this colored microlens array include transparent substrate, form at the first microlens group on the surface of a side of this transparent substrate, form at the colored filter layer on the surface of the opposite side of this transparent substrate, cover and be in colored filter layer on the light-absorbing layer, form and be in the second microlens group on the light-absorbing layer, first microlens group and second microlens group have the microlens that a plurality of arrays were arranged respectively, the light-absorbing layer on seted up a plurality ofly and many right microlens relative light trap, make first microlens group and second microlens group on a pair of microlens that correspond each other form a light tunnel. The utility model discloses a microlens array can present rich and varied projection, and the projection picture has better visual effect and richer expression.
Description
Technical Field
The utility model belongs to the technical field of optics photoelectron, in particular to colored microlens array to and an optical projection system.
Background
A Micro Lens Array (MLA) is an array type multi-lens structure with a multi-channel structure produced by a semiconductor manufacturing technology, can be applied to the fields of projectors, greeting projection lamps, warning illumination/projection and the like, and can integrate images into a Micro optical lens to generate clear images with gorgeous colors.
As shown in fig. 1, most of the existing MLAs for illumination are monochromatic, that is, the color of the pattern projected onto a receiving surface (generally, the ground) is uniform, consistent with the color of the light source used, lacks color variation, and has a single application scene.
Disclosure of Invention
In order to solve the above technical problem, an object of the present invention is to provide a color microlens array.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a color micro-lens array comprises a transparent substrate, a first micro-lens set formed on the surface of one side of the transparent substrate, a color filter layer formed on the surface of the other side of the transparent substrate, a light absorption layer covering the color filter layer, and a second micro-lens set formed on the light absorption layer, wherein the first micro-lens set and the second micro-lens set are respectively provided with a plurality of micro-lenses arranged in an array, and the light absorption layer is provided with a plurality of light holes opposite to the micro-lenses, so that a pair of micro-lenses corresponding to each other on the first micro-lens set and the second micro-lens set form a light channel.
In one embodiment, the transparent substrate is flat glass.
In another embodiment the color filter layer has a thickness of 1-3 μm.
In another embodiment, the light transmission wavelengths of the color filter layers in the plurality of light channels are different.
In another embodiment, images of a plurality of said optical channels coincide with each other.
In another embodiment, the color filter layer comprises a plurality of coating films, and the material of each coating film is SiO2Or Ti3O5。
In another embodiment, the color filter layer is divided into a plurality of repeating units, and each repeating unit at least comprises a filter layer capable of filtering red light, green light and blue light.
The utility model discloses another technical scheme is: a projection system comprising a white light source and a color microlens array as described.
Compared with the prior art, the utility model obtain following beneficial effect: the utility model discloses a microlens array can present rich and varied projection, and the projection picture has better visual effect and richer expression.
Drawings
FIG. 1 is a schematic structural diagram of a conventional microlens array;
fig. 2 is a schematic structural diagram of a color microlens array according to the present invention;
FIG. 3 is an image of a color microlens array according to the present invention;
wherein: 1. a transparent substrate; 2. a first microlens group; 3. a color filter layer; 4. a light absorbing layer; 5. a second microlens set; 6. a ground surface; 7. the pattern is projected.
Detailed Description
To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings.
Referring to fig. 2, the present embodiment provides a color microlens array, which includes a transparent substrate 1, a first microlens set 2 formed on one side surface of the transparent substrate 1, a color filter layer 3 formed on the other side surface of the transparent substrate 1, a light absorbing layer 4 covering the color filter layer 3, and a second microlens set 5 formed on the light absorbing layer 4, wherein the first microlens set 2 and the second microlens set 5 respectively have a plurality of microlenses arranged in an array, and each first microlens on the first microlens set 2 corresponds to each second microlens on the second microlens set 5 one by one. The light absorption layer 4 is provided with a plurality of light holes opposite to the plurality of pairs of microlenses, so that a pair of microlenses corresponding to each other on the first microlens set 2 and the second microlens set 5 form a light channel.
The light absorbing layer 4 is actually a mask covering the color filter layer 3, and the light holes can be opened according to the pattern or shape to be presented, and finally the color microlens array can image the pattern on the light holes on the ground or the target plane.
In an embodiment of the present invention, the transparent substrate 1 is a flat mirror, and the material is selected from a flat glass or a polymer material. The transparent base material 1 keeps a constant distance between the first micro lens group 2 and the second micro lens group 5 all the time, and keeps a light transmitting hole of the light absorbing layer 4 at an image focal plane of the second micro lens group 5.
The first micro lens can shape incident light and irradiate the light absorption layer 4, light beams penetrating through the light transmission holes are further filtered by the color filter layer 3, only light with specific wavelength is allowed to penetrate through each light channel, the filtered light beams penetrate through the transparent substrate 1 and are converged by the second micro lens, and finally, a sharp-edged and clear image is formed on a target plane, as shown in fig. 3, three projection patterns in the image can be different colors.
In another embodiment of the present invention, the thickness of the color filter layer 3 is 1-3 μm. The color filter layer 3 comprises a plurality of coating films, and the coating film material of each coating film is SiO2Or Ti3O5The filtering of light of various colors can be realized by adjusting the thickness and the material of the coating film, so that continuous display spectrum is realized.
In an embodiment of the present invention, a plurality of the optical channels in the light transmission wavelength of the color filter layer 3 is different, for example, a part of the color filter layer 3 can only transmit red light, a part of the color filter layer 3 can only transmit green light, a part of the color filter layer 3 can only transmit blue light, each optical channel corresponds to one color filter layer 3, the color filter layers 3 of a plurality of optical channels are different from each other, so that the pattern finally presented on the image plane has different colors such as red light, blue light, green light, etc.
The utility model discloses an in an embodiment, it is a plurality of the light channel like coincidence each other, consequently on the light beam through a plurality of light channels finally converges a target plane, and a plurality of light channel's formation of image coincide each other, can make the color of a plurality of light channels superpose each other like this on the one hand, demonstrate the color pattern that has mixed light, and the like superposition of a plurality of light channels of on the other hand can also form the image of clarity, hi-lite.
In an embodiment of the present invention, the surface of the transparent substrate 1 is divided into a plurality of repeating units, each of the repeating units includes a filter layer capable of filtering red light, green light, and blue light, and these repeating units can form pixel units similar to a display device, and each pixel unit is composed of basic red, green, and blue pixels. When the color micro-lens array is arranged in this way, the switching component capable of opening or closing each optical channel is additionally arranged on the upstream of the optical path of the color micro-lens array, so that the light beams passing through each optical channel can be adjusted, and further, the imaging pattern or color can be adjusted.
Another embodiment of the present invention discloses a projection system, which comprises a white light source, a collimating mirror and a color micro-lens array sequentially arranged along a light path. This patent improves to microlens array device, plates the filter film layer of different colours to the different regions of transparent substrate, because the essence of white light is mixed light, consequently, can filter white light through the rete of different colours, only passes through the light of specific colour in different regions to form colored effect on whole projection pattern.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims, specification and equivalents thereof.
Claims (8)
1. The color micro-lens array is characterized by comprising a transparent substrate (1), a first micro-lens group (2) formed on one side surface of the transparent substrate (1), a color filter layer (3) formed on the other side surface of the transparent substrate (1), a light absorption layer (4) covering the color filter layer (3), and a second micro-lens group (5) formed on the light absorption layer (4), wherein the first micro-lens group (2) and the second micro-lens group (5) are respectively provided with a plurality of micro-lenses which are arranged in an array mode, the light absorption layer (4) is provided with a plurality of light transmission holes opposite to the micro-lenses, and a pair of micro-lenses corresponding to each other on the first micro-lens group (2) and the second micro-lens group (5) form a light channel.
2. The color microlens array as claimed in claim 1, wherein: the transparent substrate (1) is flat glass.
3. The color microlens array as claimed in claim 1, wherein: the thickness of the color filter layer (3) is 1-3 mu m.
4. The color microlens array as claimed in claim 1, wherein: the light transmission wavelengths of the color filter layers (3) in the plurality of light channels are different.
5. The color microlens array as claimed in claim 1, wherein: the images of the plurality of optical channels coincide with each other.
6. The color microlens array as claimed in claim 1, wherein: the color filter layer (3) comprises a plurality of coating films, and the coating film material of each coating film is SiO2Or Ti3O5。
7. The color microlens array as claimed in claim 1, wherein: the color filter layer (3) is divided into a plurality of repeating units, and each repeating unit at least comprises a filter layer capable of filtering red light, green light and blue light.
8. A projection system, characterized by: comprising a white light source and a color microlens array according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023299531.5U CN213600910U (en) | 2020-12-30 | 2020-12-30 | Color microlens array and projection system |
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| CN202023299531.5U CN213600910U (en) | 2020-12-30 | 2020-12-30 | Color microlens array and projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690280A (en) * | 2020-12-30 | 2022-07-01 | 苏州晶方光电科技有限公司 | Color microlens array, method of manufacturing the same, and projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690280A (en) * | 2020-12-30 | 2022-07-01 | 苏州晶方光电科技有限公司 | Color microlens array, method of manufacturing the same, and projection system |
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